Pump



w. R.- TWIFORD.

PUMP.

APPLICATION FILED JAN. 3, 1920.

Patented Sept. 7,1920.

lNl/E/WUR A TTURNEYS W/ TNESSES UNITED STATES PATENT GFFECE.

WILLIAM R. TWIFORD, OF MANVILLE, WYOMING.

PUMP.

Application filed. January 3, 1920.

.column of water in the delivery pipe being counterbalanced by the pump plunger in a different pipe; to provide a pump in which the working parts are subjected to the least amount of wear as to frictional contact between one another, and being so designed that sand or other solid particles that may pass upward from the well along with the water will never come in contact with the working parts of the pump.

Vith the foregoing and other objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which- Figure 1 is a vertical sectional view of a preferred embodiment of the invention.

Fig. 2 is an enlarged vertical sectional view of parts of the pump mechanism shown in Fig. 1.

Referring now more specifically to the drawings 1 show at 10 a pipe projecting to any suitable distance into a well or other place from which the water is to be pumped. A strainer .11 may be attached to the lower end of this pipe if desired. 12 indicates a water delivery pipe which may extend upward to any desired distance or point of delivery of water. By the term water as used herein 1 wish to be understood as covering any liquid that is to be pumped and delivered as distinguished from the body of oil that may be regarded as a permanent part or feature of the pump. The lower end of the pipe 12 is connected to the upper portion Specification of Letters Patent.

Patented Sept. 7, 1920.

Serial No. 849,181.

14 to prevent the reverse or downward flow of the water.

To the upper end 10 of the pipe 10 is attached a pump barrel indicated as a whole at 15 and comprising preferably a pump cylinder 16 between which and the pipe section 10 is located a drum or enlargement 17 of considerably larger diameter and capacity than the cylinder 16.

Located and adapted to reciprocate within the cylinder is a piston or plunger 18 having a hollow piston rod 19 leading upward to the point of application of the power which may be effected by any well known method. As indicated in Fig. 2 the piston rod is provided with a hole 20 just above the piston whereby oil 0 may be introduced into the cylinder downward through the hollow piston rod and thus assure that at least a film of oil will always be carried upon the upper end of the piston. The body of oil constantly fills the cylinder beneath the piston and a portion of the drum space 17. The body of oil is supported upon a body of water filling the lower portion of the drum 17 and remaining portions of the pipe connections.

arranged and the liquids disposed as shown in Fig. 1 a downward thrust on the piston will cause the oil in the cylinder to act in the nature of a piston and cause the water just below the drum to be forced laterally and upward through the elbow 13 toward no far as thus set forth and with the parts.

the point of delivery of the pipe 12. The

check valve below the pipe section 10 will prevent the downward flow of such water while the valve above the elbow will permit water to pass upward. On the next upstroke of the piston both bodies of fluid in, the drum will follow the piston causing a suction of the water from the well upward through the pipe 10 past the valves 14 therein bringing a fresh supply of water into the lower portion of the drum and pipe section 10. The nature of the fluid in which the piston operates is such that no special packing means is required to make the piston fiuid tight and moreover the wear upon the piston is therefore practically negligible. beyond the slight degree of wear in the valves which may be made of a wear resisting material, there is practically no wear in the pump.

Whereas in an ordinary pump the pump rods are located within the rising column of water, the weight of the rods is added to the weight of the column of water accounting thus for the great amount of power required to operate the pump especially in deep wells, in my-construction the piston and rods being located outside of the pipe 12 the weight of the piston rods and piston serves to counterbalance to a considerable extent theweight of the column of water in the: pipe 12. Hence the force required to operate the pump is materially less than in the ordinary water pump.

The body of oil carried on the top of the piston serves to prevent the piston from sucking the air on its upstroke. In order to maintain a suitable supply of oil beneath the piston and in the upper portion of the drum 17 I employ a goose neck or overflow pipe 21 the same being in open communication with the upper end of the cylinder 16 just above the piston and in communication with the upper end of the drum through a return bend or U 21. In the main portion of the overflow pipe where it is connected to the upper end of one leg of the U is fitted a check valve 22 seating downward and having a stem 23 eight or ten inches in length carrying at its upper end a float 24. In the other leg of the U is fitted a check valve 25 also adapted to open upward. Oil admitted into the upper end of the goose neck 21 will tend to fill the same and lift the valve 22 by virtue of the float 24. The oil will thus be delivered past the valve 22 and fill the remainder of the goose neck as well as the upper portion of the drum, Oil will not be sucked however from the goose neck as a result of the downward stroke of the piston because of the closing of the check valve 25. The valve 22 provided with a float as shown prevents this part of the device from getting dry and sucking air by keeping oil at all times above the valve. lVhen the overflow pipe is full the float lifts the valve and permits the oil to be sucked into the pipe or drum below the cylinder on the upstroke of the piston. Thus when needed, oil may be poured down the hollow'piston rod whence it will run into the overflow pipe.

The enlargement of the barrel at 17 may or may not be employed according to various conditions, for example I have found that without the enlargement or drum a long quick stroke of the piston has a tendency to cause an emulsion or mixture of the oil and water, although such efleet is not produced With a slower stroke. lVith the drum 1'? provided however there is no tendency for the oil and water to miX no matter how rapidly the piston may be operated.

I claim:

1. In a pump, the combination with a water pipe leading from the well to a pointof delivery and having valve means therein to prevent the downward flow of water in the pipe, of a pump barrel connected to the pipe and extending upward from the point of connection at one side of the water pipe, a body of oil maintained permanently in the upper portion of the barrel, the said upper portion of the barrel constituting a pump cylinder, a reciprocating piston in the cylinder immersed in the oil, and -meansto maintain a suitable supply of oil both above and below the piston.

2. A pump of the nature set forth in claim 1 in which a portion of the barrel is enlarged in diameter over that of the cylinder constituting a drum.

3. The combination with a water pipe leading from the well upward to a point of delivery and valve means therein to prevent downward movement of the water, of a pump barrel attachment for the water pipe, the same extending upward from its point of attachment, the upper end of the barrel constituting a pump cylinder and filled with oil while the lower portion of the barrel is filled with water supporting the oil, a piston movably mounted in the cylinder and immersed in oil, and means including an overflow pipe communicating with the cylinder above and below the piston to maintain a suitable supply of oil therein.

4. A device of the nature set forth in claim 3 in which the overflow pipe is provided with a floating check valve to insure a downward movement of oil through the overflow p1 e.

5 A device of the nature set forth in claim 3 in which the piston is operated by a hollow piston rod with a delivery hole for oil near its lower end.

lVILLIAM R. Tl/VIFORD. 

